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TOMOYO Linux Cross Reference
Linux/include/drm/drm_device.h

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  1 #ifndef _DRM_DEVICE_H_
  2 #define _DRM_DEVICE_H_
  3 
  4 #include <linux/list.h>
  5 #include <linux/kref.h>
  6 #include <linux/mutex.h>
  7 #include <linux/idr.h>
  8 
  9 #include <drm/drm_hashtab.h>
 10 #include <drm/drm_mode_config.h>
 11 
 12 struct drm_driver;
 13 struct drm_minor;
 14 struct drm_master;
 15 struct drm_device_dma;
 16 struct drm_vblank_crtc;
 17 struct drm_sg_mem;
 18 struct drm_local_map;
 19 struct drm_vma_offset_manager;
 20 struct drm_fb_helper;
 21 
 22 struct inode;
 23 
 24 struct pci_dev;
 25 struct pci_controller;
 26 
 27 /**
 28  * DRM device structure. This structure represent a complete card that
 29  * may contain multiple heads.
 30  */
 31 struct drm_device {
 32         struct list_head legacy_dev_list;/**< list of devices per driver for stealth attach cleanup */
 33         int if_version;                 /**< Highest interface version set */
 34 
 35         /** \name Lifetime Management */
 36         /*@{ */
 37         struct kref ref;                /**< Object ref-count */
 38         struct device *dev;             /**< Device structure of bus-device */
 39         struct drm_driver *driver;      /**< DRM driver managing the device */
 40         void *dev_private;              /**< DRM driver private data */
 41         struct drm_minor *primary;              /**< Primary node */
 42         struct drm_minor *render;               /**< Render node */
 43         bool registered;
 44 
 45         /* currently active master for this device. Protected by master_mutex */
 46         struct drm_master *master;
 47 
 48         /**
 49          * @driver_features: per-device driver features
 50          *
 51          * Drivers can clear specific flags here to disallow
 52          * certain features on a per-device basis while still
 53          * sharing a single &struct drm_driver instance across
 54          * all devices.
 55          */
 56         u32 driver_features;
 57 
 58         /**
 59          * @unplugged:
 60          *
 61          * Flag to tell if the device has been unplugged.
 62          * See drm_dev_enter() and drm_dev_is_unplugged().
 63          */
 64         bool unplugged;
 65 
 66         struct inode *anon_inode;               /**< inode for private address-space */
 67         char *unique;                           /**< unique name of the device */
 68         /*@} */
 69 
 70         /** \name Locks */
 71         /*@{ */
 72         struct mutex struct_mutex;      /**< For others */
 73         struct mutex master_mutex;      /**< For drm_minor::master and drm_file::is_master */
 74         /*@} */
 75 
 76         /** \name Usage Counters */
 77         /*@{ */
 78         int open_count;                 /**< Outstanding files open, protected by drm_global_mutex. */
 79         spinlock_t buf_lock;            /**< For drm_device::buf_use and a few other things. */
 80         int buf_use;                    /**< Buffers in use -- cannot alloc */
 81         atomic_t buf_alloc;             /**< Buffer allocation in progress */
 82         /*@} */
 83 
 84         struct mutex filelist_mutex;
 85         struct list_head filelist;
 86 
 87         /**
 88          * @filelist_internal:
 89          *
 90          * List of open DRM files for in-kernel clients. Protected by @filelist_mutex.
 91          */
 92         struct list_head filelist_internal;
 93 
 94         /**
 95          * @clientlist_mutex:
 96          *
 97          * Protects @clientlist access.
 98          */
 99         struct mutex clientlist_mutex;
100 
101         /**
102          * @clientlist:
103          *
104          * List of in-kernel clients. Protected by @clientlist_mutex.
105          */
106         struct list_head clientlist;
107 
108         /** \name Memory management */
109         /*@{ */
110         struct list_head maplist;       /**< Linked list of regions */
111         struct drm_open_hash map_hash;  /**< User token hash table for maps */
112 
113         /** \name Context handle management */
114         /*@{ */
115         struct list_head ctxlist;       /**< Linked list of context handles */
116         struct mutex ctxlist_mutex;     /**< For ctxlist */
117 
118         struct idr ctx_idr;
119 
120         struct list_head vmalist;       /**< List of vmas (for debugging) */
121 
122         /*@} */
123 
124         /** \name DMA support */
125         /*@{ */
126         struct drm_device_dma *dma;             /**< Optional pointer for DMA support */
127         /*@} */
128 
129         /** \name Context support */
130         /*@{ */
131 
132         __volatile__ long context_flag; /**< Context swapping flag */
133         int last_context;               /**< Last current context */
134         /*@} */
135 
136         /**
137          * @irq_enabled:
138          *
139          * Indicates that interrupt handling is enabled, specifically vblank
140          * handling. Drivers which don't use drm_irq_install() need to set this
141          * to true manually.
142          */
143         bool irq_enabled;
144         int irq;
145 
146         /**
147          * @vblank_disable_immediate:
148          *
149          * If true, vblank interrupt will be disabled immediately when the
150          * refcount drops to zero, as opposed to via the vblank disable
151          * timer.
152          *
153          * This can be set to true it the hardware has a working vblank counter
154          * with high-precision timestamping (otherwise there are races) and the
155          * driver uses drm_crtc_vblank_on() and drm_crtc_vblank_off()
156          * appropriately. See also @max_vblank_count and
157          * &drm_crtc_funcs.get_vblank_counter.
158          */
159         bool vblank_disable_immediate;
160 
161         /**
162          * @vblank:
163          *
164          * Array of vblank tracking structures, one per &struct drm_crtc. For
165          * historical reasons (vblank support predates kernel modesetting) this
166          * is free-standing and not part of &struct drm_crtc itself. It must be
167          * initialized explicitly by calling drm_vblank_init().
168          */
169         struct drm_vblank_crtc *vblank;
170 
171         spinlock_t vblank_time_lock;    /**< Protects vblank count and time updates during vblank enable/disable */
172         spinlock_t vbl_lock;
173 
174         /**
175          * @max_vblank_count:
176          *
177          * Maximum value of the vblank registers. This value +1 will result in a
178          * wrap-around of the vblank register. It is used by the vblank core to
179          * handle wrap-arounds.
180          *
181          * If set to zero the vblank core will try to guess the elapsed vblanks
182          * between times when the vblank interrupt is disabled through
183          * high-precision timestamps. That approach is suffering from small
184          * races and imprecision over longer time periods, hence exposing a
185          * hardware vblank counter is always recommended.
186          *
187          * If non-zeor, &drm_crtc_funcs.get_vblank_counter must be set.
188          */
189         u32 max_vblank_count;           /**< size of vblank counter register */
190 
191         /**
192          * List of events
193          */
194         struct list_head vblank_event_list;
195         spinlock_t event_lock;
196 
197         /*@} */
198 
199         struct drm_agp_head *agp;       /**< AGP data */
200 
201         struct pci_dev *pdev;           /**< PCI device structure */
202 #ifdef __alpha__
203         struct pci_controller *hose;
204 #endif
205 
206         struct drm_sg_mem *sg;  /**< Scatter gather memory */
207         unsigned int num_crtcs;                  /**< Number of CRTCs on this device */
208 
209         struct {
210                 int context;
211                 struct drm_hw_lock *lock;
212         } sigdata;
213 
214         struct drm_local_map *agp_buffer_map;
215         unsigned int agp_buffer_token;
216 
217         struct drm_mode_config mode_config;     /**< Current mode config */
218 
219         /** \name GEM information */
220         /*@{ */
221         struct mutex object_name_lock;
222         struct idr object_name_idr;
223         struct drm_vma_offset_manager *vma_offset_manager;
224         /*@} */
225         int switch_power_state;
226 
227         /**
228          * @fb_helper:
229          *
230          * Pointer to the fbdev emulation structure.
231          * Set by drm_fb_helper_init() and cleared by drm_fb_helper_fini().
232          */
233         struct drm_fb_helper *fb_helper;
234 };
235 
236 #endif
237 

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